<button class="btn btn-outline-secondary" data-modal-title="<?php echo lang('reward');?>" data-modal-size="md" data-modal-url="<?php echo url('thread-reward-'.$tid);?>">
    <i class="icon icon-bitcoin" aria-label="<?php echo lang('reward');?>"></i>&nbsp;<span><?php echo lang('reward');?></span>
</button>